Most of the time, I use Linux for my everyday works.
Recently I need webcam Yahoo! comunication to contact my family and have to reboot to Windows to use YM.
Then I found GYachi http://gyachi.sourceforge.net/download.shtml
Instead compiling from source, I reach https://launchpad.net/~loell/+archive/ppa to setup repository and manage to pull out Debian binary version of GYachi using synaptic.
It runs perfectly for webcam YM!, although its interface is a kind of messy. After a while, you will get use to it.
GYachi also provides Voice chat (not Voice call though), which I think has to carry out in the conference room.